In this section:
If you require a button to make a (Windows) beep sound this call-back will provide a quick and simple way of doing so. It may be most useful when used in conjunction with the call-back joiner '+'. It takes one of the following five possible arguments:
These correspond to the warning icons built into Windows (see Standard icon).
i=winio@(' %^bt[PRESS] ', '+' , 'BEEP[MBOK]', cb_openfile )